Albert rudolf bolle



(No Model.)` v

A.R.B0LLB. ALBUM CLASP.

No.1267,771. Patented Nov.21f, 1882.

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UNITED STATES PATENT OFFICE.

ALBERT RUDOLF BOLLE, OF BERLIN, GERMANY, ASSIGNOR TO LIEBENROTH, VON AUW 85 CO., OF NEW YORK, N. Y.

ALBUM-CLASP.

SPECIFICATION forming part of Letters Patent No. 267,771, dated November 21, 1882.

Application led September 8, 1882. (No model.)

' a subject of the German Empire, residing at Berlin,in the Kingdom of Prussia, Germany,

have invented a certain new and useful Improvement in Extension Album-Olasps; and I do hereby declare that the following is a full, clear, and eXact description thereof,-refere'nce being had to the accompanying drawings, making a part of this specification.

My invention relates to that class of albumclasps which have an extension tongue or hasp, so as to accommodate themselves to the varying thickness ot' the book. The clasp consists of two disks or plates, which may be round or of any desired shape, one of which is hinged to a plate, which is attached to one cover of the book. Between these disks is a sliding hasp or plate for engaging with the pin on the op- .posite cover ofthe book.

On the drawings like letters indicate like parts.

Figure l is a view of the complete clasp, the position of the sliding hasp or plate and the spring connected therewith being indicated by dotted lines. Fig. 2 is a view of theinside or back ofthe revolving disk A, showing the sliding hasp B and the spring in position. Fig. 3 is a sectional view of the clasp through the line o; w, Fig. l. Fig. 4 is a view ofthe lower or stationary disk, C, showing its edge or sides out away from D D for the reception of the sliding hasp B. Fig. 5 is a view ofthe inside or back of the revolving disk A, as in Fig. 2, but without the sliding hasp and spring. Fig. 6 is aview of the sliding hasp B.

As shown in the drawings, the hasp is thrown out to clasp and unclasp the book by revolving the upper disk, A; but the clasp may beso constructed that either disk may be revolved.

Attached to the back ot' the revolving disk A at its center is a pin or pivot, P, shown more distinctly in Figs. 2 and 5. This pin is long enough to pass through a hole, o, in the the center ot' the fixed disk C, and by it the two disks are fastened together. This pinis formed with a shoulder, which rests against the tixed disk C, and upon it the disk A revolves.

Projecting from the pin P, and attached to the disk A, is an elevated arm, E, Fig. 5, having at its outer end a short pin, F. The hasp B has two slots, one along the center s, and the other at right angles thereto, as shown at e, Fig. 6. The hasp is so placed that the center pin, P, rests in the slots, and the small pin F in the slot e. Vithin the slot s and be- `tweed the pin P and projection 1^, hereinafter mentioned, is placed a spring, as shown in Fig. 2. A small projection on the hasp at the end of the slot s, at r, forms a bearing for the spring, and corresponds in height with the projecting arm E, upon which the hasp slides.

As will be seen from the drawings, when the disk A is revolved in the direction of the arrow about the pin P, the arm E, with the small pin F attached to it, is also moved, and, sliding in the slot e, moves or carries on the hasp. At the same time the spring is contracted by the projection 'r moving toward the pin P, so that when the force is removed from the disk the actionof the spring carries the hasp back to its former position.

It will be seen that the clasp accommodates itself to the thickness of the book, the hasp, by means of the spring, always holding the covers tightly together. lt is not, however, necessary to revolve the disk in order to move the hasp, as the hasp itself may be pulled out, thereby revolving the disk, and placedover the pin on the opposite cover.

While this clasp is especially designed for albums and other books that increase in thickness as they become illed, it is equally adapted to all books, and may be used on pocketbooks and wherever a varyin g length of clasp is necessary.

In many cases, when employed ou pocket books or in similar applications, the clasp may be used with a single disk-the revolving onewhich may be pivoted directly to the surface of the article it is intended to clasp. The spring S can also, under many circumstances, be dispensed with, the hasp being made to fit the other part-s so closely as to remain in any position in which it is placed.

What I claim isy l. An extension-clasp for albums, dac., consistin g of the disk A, carrying the pin F, th'e 2 wenn disk C, the slotted hasp B, and the spring 3. In an extension-clasp, the combination of ro S, constructed and operated substantiall7 as. e revolving disk, A, carrying the pin F, and described. the hasp B, provided with two slots at right 2., In an extension-clasp, the combination of angles to each other, constructed land operatthe revolving disk A, carrying the pin F, the ing substantially as described.

liasp B, provided with two slots ab right an- ALBEBT RUDOLF BOLLE. gles to each other, and the spring S, substan- Witnesses: tially as described, and for the purpose set GEORGE JORDAN,

forth. H. ZIMMERMAN. 

